Methods, systems, and computer readable media for mitigating effects of access token misuse

A system for mitigating effects of access token misuse, the system comprising:

• at least one processor;
• a memory;
• and
• a network function (NF) implemented using the at least one processor and the memory, the NF configured for:
• receiving, from a sender, a service request comprising an access token, wherein the access token includes an access token identifier and usage attributes indicating a message rate limit, wherein the access token comprises an OAuth 2.0 access token and the usage attributes indicating the message rate limit include a claim of the OAuth 2.0 access token specifying a message rate limit or a message count limit;
• after the service request is received, updating a message rate value of a rate counter for indicating a received rate of service requests associated with the access token;
• determining, using the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token, that the service request should be rejected, wherein determining using the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token that the service request should be rejected includes comparing the message rate value and the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token and determining that the message rate value exceeds the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token;
• and
• rejecting the service request.

A non-transitory computer readable medium having stored thereon executable instructions that when executed by at least one processor of a network function (NF) cause the NF to perform steps comprising:

• receiving, from a sender, a service request comprising an access token, wherein the access token includes an access token identifier and usage attributes indicating a message rate limit, wherein the access token comprises an OAuth 2.0 access token and the usage attributes indicating the message rate limit include a claim of the OAuth 2.0 access token specifying a message rate limit or a message count limit;
• after the service request is received, updating a message rate value of a rate counter for indicating a received rate of service requests associated with the access token;
• determining, using the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token, that the service request should be rejected, wherein determining, using the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token that the service request should be rejected includes comparing the message rate value and the message rate limit or the message count limit specified by the claim of the OAuth 2.0 access token and determining that the message rate value exceeds the message rate limit or the message count limit specified b the claim of the OAuth 2.0 access token;
• and
• rejecting the service request.